In This Podcast:
Jim Johnson, an experienced trade school and community college instructor, discusses the HVAC industry and his column in The NEWS, ‘The Service Ticket.’ Listen now for a hint to the Not Enough Heat question from the Dec. 15 issue.
Q: Can you share a little bit about your HVACR background?
A: We operate an independent training firm, Technical Training Associates, based near Tucson, Arizona, and we offer training for technicians in a lot of different areas. We also produce and develop a series of training videos for HVAC technicians that allow them to get a grip on how to service equipment, troubleshoot, make repairs, and do things effectively so things work like they’re supposed to. My father was in the business and, in the mid-1960s, he worked for a large distributor that sold refrigerators and things like that. In those days, companies didn’t mind if techs moonlighted. That allowed me to run service calls with my dad as a kid, and, once I got through some electrical training, getting into HVAC was just natural.
Q: What is ‘The Service Ticket’ column, and where did the idea come from?
A: This is an opportunity for people who work in the HVAC industry — maybe they’re working their way up through college or trade school — to learn more about or review their understanding of troubleshooting equipment. … Troubleshooting can be accomplished by systematically eliminating the possibilities when solving a problem with a piece of equipment. [This was born] As a result of experiences I had in the field, working with students and new techs who struggle with learning how to evaluate a situation and come to a definite conclusion about which specific component is responsible for the breakdown.
Q: Can you give us a hint to the ‘Not Enough Heat’ question from the Dec. 15 issue?
A: It’s a two-part answer. I’ll offer a hint to the first part of the answer. From a fundamental perspective of the operation of an electrical system — remember two simple facts about a switch that’s wired in series with loaded controls: No voltage will be read across a closed switch, and voltage will be read across an open switch as long as the load itself isn’t open.
Owner, Technical Training Associates
Green Valley, Arizona
Publication date: 3/2/2015